Table and chair backrest mounting structure

Abstract

The utility model relates to the technical field of furniture manufacturing, in particular to a table and chair backrest installation structure which comprises a backrest frame, a clamping ring and a fixing protruding block, one side of the bending position of the backrest frame is provided with a one-way penetrating through hole, and the through hole is communicated with the interior of the backrest frame; one end of the clamping ring is fixedly connected with the inner bend of the bent position of the backrest frame, the other end of the clamping ring penetrates through the inner bend of the bent position of the backrest frame and extends into the backrest frame, the fixing protruding block is welded and fixed into the backrest frame, and a threaded hole is formed in the side, close to the through hole of the backrest frame, of the fixing protruding block. According to the technical scheme, the through holes of the backrest frame can be blocked after fixation is completed, then paint spraying is conducted, the surface of the backrest frame looks like a whole, the clamping rings can be hidden through the size of the clamping rings and the structure of the backrest, and therefore the clamping rings can be hidden conveniently. Therefore, the fixing strength is not affected while the attractiveness is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of furniture manufacturing, especially a desk and chair backrest mounting structure. BACKGROUND

[0002] In the existing desk and chair backrest mounting structure, the connection mode of the backrest and the seat frame usually adopts traditional methods such as welding, bolt fixing or buckle connection, which can meet the basic fixed needs of daily life.

[0003] At present, the traditional welding or bolt exposed mode can cause obvious connection marks on the surface of the backrest frame, which affects the overall appearance of the product, especially in high-grade office furniture or home design, the exposed structure is difficult to meet the needs of users for simple appearance, and part of the backrest adopts a multi-component assembly mode, such as an additional connecting plate, screw or buckle, which increases the manufacturing cost, so it is necessary to design a desk and chair backrest mounting structure. SUMMARY

[0004] The utility model aims at providing a desk and chair backrest mounting structure to solve the problems existing in the prior art.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A desk and chair backrest mounting structure comprises a backrest frame, the backrest frame is a hollow circular pipe, the bending part is located at the middle segment of the backrest frame, and a one-way through hole is arranged on one side of the bending part, the through hole is in communication with the inside of the backrest frame;

[0007] A clamping ring is made of a material with certain elasticity, one end of the clamping ring is fixedly connected with the inner bend of the bending part of the backrest frame, the other end of the clamping ring extends to the inside of the backrest frame through the inner bend of the bending part of the backrest frame, and the position where the clamping ring is fixedly connected with the inner bend of the backrest frame and the position where the clamping ring passes through the inner bend of the backrest frame are symmetrically arranged about the backrest frame;

[0008] A fixed protrusion is fixedly welded in the middle of the inside of the backrest frame, a threaded hole corresponding to the through hole is arranged on the side of the fixed protrusion close to the through hole of the backrest frame, a bolt is screwed in the threaded hole, and the bolt is used to cooperate with the fixed protrusion to fix one end of the clamping ring in the inside of the backrest frame.

[0009] By adopting the above technical scheme, the through hole of the backrest frame can be plugged after fixing, and then paint is sprayed, so that the surface looks like a whole, and the clamping ring can be hidden by the size of the clamping ring and the structure of the backrest, so that the appearance is improved without affecting the fixing strength.

[0010] In a further embodiment, the clamping ring is located at an end portion inside the backrest frame, the end portion is provided with a convex ring, a circular hole is formed in the convex ring, and the bolt is screwed in the threaded hole of the fixing protrusion after passing through the circular hole.

[0011] By adopting the technical scheme, the threaded hole is inclined, and the locking force of the clamping ring can be adjusted by the locking depth of the bolt.

[0012] In a further embodiment, a back plate is further included, a cylindrical portion is arranged on one side of the back plate facing the backrest frame, and the cylindrical portion is clamped inside the bending portion of the clamping ring and the backrest frame.

[0013] In a further embodiment, a ring groove for accommodating the clamping ring is arranged on the side of the cylindrical portion close to the backrest.

[0014] By adopting the technical scheme, the ring groove can better hide the clamping ring, and the installation stability of the backrest can be improved.

[0015] In a further embodiment, the side of the fixing protrusion where the threaded hole is arranged is an inclined surface.

[0016] In a further embodiment, the inner wall of the through hole is provided with a thread.

[0017] In summary, the utility model has the following beneficial effects:

[0018] 1. After the fixing is completed, the through hole of the backrest frame can be blocked, and then paint is sprayed, so that the surface looks like a whole, and the clamping ring can be hidden through the size of the clamping ring and the structure of the backrest, so that the effect of increasing the aesthetic property while not affecting the fixing strength is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the whole structure of the utility model;

[0020] In the figure, 1, backrest frame; 2, clamping ring; 3, fixing protrusion; 4, bending portion; 5, convex ring; 6, back plate. DETAILED DESCRIPTION

[0021] The utility model will be further described in detail below in combination with the drawings.

[0022] Wherein, same parts are indicated by same reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the drawings attached Figure 1In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0023] Example 1:

[0024] like Figure 1 As shown, a table and chair backrest mounting structure includes: a backrest frame 1, a retaining ring 2, and a fixing protrusion 3. The backrest frame 1 is composed of a hollow cylindrical tube bent 4, with the bend 4 located in the middle section of the backrest frame 1. A one-way through hole is provided on one side of the bend 4, and the through hole communicates with the interior of the backrest frame 1. The retaining ring 2 is a semi-circular ring made of a material with a certain elasticity. One end of the retaining ring 2 is fixedly connected to the inner bend of the bend 4 of the backrest frame 1, and the other end of the retaining ring 2 passes through the inner bend 4 of the backrest frame 1 and extends into the interior of the backrest frame 1. The positions where the retaining ring 2 is fixedly connected to the inner bend of the backrest frame 1 and the positions where the retaining ring 2 passes through the inner bend of the backrest frame 1 are symmetrically arranged about the backrest frame 1.

[0025] The fixing protrusion 3 is welded and fixed in the middle of the backrest frame 1. The fixing protrusion 3 has a threaded hole corresponding to the through hole on the side of the backrest frame 1 near the through hole. A bolt is screwed into the threaded hole. The bolt is used to cooperate with the fixing protrusion 3 to fix the retaining ring 2 located at one end inside the backrest frame 1.

[0026] The retaining ring 2 is located at one end inside the backrest frame 1. The end is provided with a protruding ring 5. A round hole is opened on the protruding ring. After the bolt passes through the round hole, it is screwed into the threaded hole of the fixing protrusion 3. It also includes a back plate 6. The back plate 6 is provided with a cylindrical part on the side facing the backrest frame 1. The cylindrical part is locked in the inner bend of the bend 4 between the retaining ring 2 and the backrest frame 1. The cylindrical part is provided with an annular groove for accommodating the retaining ring 2 on the side near the backrest. The side of the fixing protrusion 3 with the threaded hole is inclined, and the inner wall of the hole is provided with threads.

[0027] Specific implementation process: the inside hollow round pipe is bent 4 and constitutes the backrest frame 1, the bending 4 is located in the middle section position of backrest frame 4, and the side of bending 4 is provided with a via hole, the inside middle position of backrest frame 1 is welded with fixed lug 3, the side of fixed lug 3 near the via hole of backrest frame 1 is provided with a threaded hole, the inside of backrest frame 1 is provided with snap ring 2, one end of snap ring 2 is fixedly connected with the inside bend of bending 4 of backrest frame 1, the other end extends to the inside of backrest frame 1, then through the cooperation of screw and fixed lug 3, the snap ring 2 is firmly fixed in the inside bend of backrest frame 1, then after assembling, the via hole is sprayed to cover, the product's aesthetic property is increased, and the stability is not affected.

[0028] In the embodiments disclosed in the present application, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixedly connected, or can be detachably connected, or integrally connected; "connecting" can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments disclosed in the present application can be understood according to the specific circumstances.

[0029] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application, and those skilled in the art can make non-creative modifications to the embodiments according to the needs after reading the present application, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A table and chair backrest mounting structure, characterized in that, The utility model relates to a backrest frame (1) is hollow inside the pipe bending (4) of being composed, and bending (4) is located in the middle section position of backrest frame (1), and is provided with one-way through hole on the side at bending (4), and the through hole communicates with the inside of backrest frame (1); Clamp ring (2) is made of the semicircle ring of certain elastic material, and one end of clamp ring (2) is fixedly connected with the inner bending of bending (4) of backrest frame (1), and the other end of clamp ring (2) passes through the inner bending of bending (4) of backrest frame (1) and extends to the inside of backrest frame (1), and the position of clamp ring (2) and the inner bending of backrest frame (1) fixedly connected and the position of clamp ring (2) passing through the inner bending of backrest frame (1) are symmetrically arranged about backrest frame (1); And fixed lug (3) is welded and fixed in the inside intermediate position of backrest frame (1), and the fixed lug (3) is provided with the threaded hole corresponding with the through hole near the side of through hole of backrest frame (1), and the threaded hole is screwed with bolt, and the bolt is used for and fixed lug (3) cooperation fixed clamp ring (2) in the inside one end of backrest frame (1). The end of clamp ring (2) in the inside of backrest frame (1) is provided with convex ring (5), and the circular hole is set up on the convex ring, and the bolt is screwed in the threaded hole of fixed lug (3) after passing through the circular hole.

2. The table and chair back mounting structure according to claim 1, characterized by: It further includes back plate (6), and the one side of back plate (6) towards backrest frame (1) is provided with cylindrical part, and the cylindrical part is clamped in the inside of bending (4) of clamp ring (2) and backrest frame (1).

3. The table and chair back mounting structure according to claim 1, characterized by: The one side of cylindrical part near backrest is provided with ring groove for accommodating clamp ring (2).

4. The table and chair back mounting structure according to claim 3, characterized by: The one side of fixed lug (3) provided with threaded hole is inclined surface.

5. The table and chair back mounting structure according to claim 1, characterized by: The inner wall of through hole is provided with screw thread.

6. The table and chair back mounting structure according to claim 1, characterized by: ​

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